Thermophilic aeration of cattle slurry with whey and/or jam wastes

Bioresource Technology
Helvi Heinonen-TanskiArja Ruokojärvi

Abstract

Thermophilic aeration of cattle slurry and food industrial by-products was studied with the aim to improve hygienic qualities of the slurry so that it could be used as a safe fertiliser for berries to be eaten raw. We also wanted to study if the process would be energetically favourable in an arctic climate. Cattle slurry alone or with whey and/or jam waste was treated. The tests were done in a well heat-insulated reactor with a 10 m(3) volume. Temperature increases up to over 70 degrees C could be recorded in 19 days even though some processes were carried out in winter time when the ambient air temperature was less than 0 degrees C. The heat energy formed was higher than the electrical energy needed to carry out the aeration. The hygienic qualities of the aerated product were good with only minor nitrogen losses. The end product could be useful as a fertiliser and soil improving compound to increase the organic matter content of agricultural soil. Cattle slurry alone was well suited as the raw material if attaining a high temperature was the main goal. A part of slurry could be replaced with food-industrial side products. Whey waste suited better for co-composting than jam waste but the mixture of whey, jam waste, and slurry ...Continue Reading

References

May 1, 1982·Antonie van Leeuwenhoek·E Wilde, H G Schlegel
Nov 7, 2003·Applied and Environmental Microbiology·Paula A BelinkyCarlos G Dosoretz

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Citations

Oct 6, 2011·Environmental Technology·Mohammed MohaibesHelvi Heinonen-Tanski
Sep 11, 2009·International Journal of Environmental Research and Public Health·Anna V PiterinaJ Tony Pembroke
Dec 2, 2008·Journal of Applied Microbiology·J Jofre
Oct 10, 2007·Journal of Applied Microbiology·J O UgwuanyiB McNeil
Jun 19, 2012·Journal of Applied Microbiology·K OtawaY Nakai
Apr 16, 2010·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Tiina TonttiArja Halinen
Jul 25, 2017·Bioresource Technology·Shuguang Wang, Yang Zeng

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